Robert Boschgmbh

Axel Kuhnle

Willy Braun

Karl Frauhammer

Heinz Schnerring

Gerhard Meixner

Carsten Diem

Dietmar Saur

Matthias Tauber

Christian Wiedemann

Patrick Heinen

Helmut Wanek

Andreas Strasser

Joerg Kaiser

Roger Hahn

Juergen Bochert

Thomas Speda

Hans-Peter Aglassinger

Heiko Roehm

Joachim Schadow

Marcin Rejman

Uwe Engelfried

Otto Baumann

Hardy Schmid

Ralph Dammertz

Juergen Lennartz

Ulrich Bohne

Steffen Tiede

Dietmar Hahn

Justus Lamprecht

Jan Breitenbach

Erhard Hoffmann

Thomas Bernhardt

Lars Schmid

Rolf Mueller

Ulrich Single

Joerg Lemmel

Tobias Overbeck

Richard Engel

Hagen Philipp Keinath

Christian Koepf

Sebastian Maier

Andreas Heilmann

Peter Schwenkel

Tobias Mangold

Benjamin Grauer

Arindam Haldar

A method for detecting a transmission backlash in a hand-held power tool, the hand-held power tool comprising a drive motor that has a drive shaft, a tool spindle, and a transmission that, in respect of drive, connects the drive shaft to the tool spindle, includes actuating, in a first actuation, the drive motor at least until the value of a first variable, representing a drag torque, is at least approximately constant. The method includes, during the first actuation, determining a value of a second variable which is associated with the rotation of the drive shaft of the drive motor during the first actuation, and determining a value of a third variable, representing a transmission backlash, based upon a change in the second variable during the first actuation.

Procedure for detecting a transmission backlash in a power tool, in particular a hand-held power tool, and power tool

An electrical consumer system includes an electrical consumer with a first mating interface and a first plurality of electrical contacts, and a removable battery pack including a second mating interface and a second plurality of electrical contacts, the second mating interface configured to removably mate with the first mating interface such that the second plurality of contacts contact the first plurality of contacts. At least one of the first and second mating interfaces includes a temperature sensor configured to detect at least one of a temperature of the at least one of the first and second mating interfaces, and a temperature of the first or second electrical contacts of the at least one of the first and second mating interfaces.

Removable battery pack and/or electrical consumer with an electromechanical interface for supplying energy

A protective device at least for protecting a user in the event of an uncontrolled blockage of a portable power tool includes at least one rotationally drivable shaft and at least one wrap-spring-free overload clutch unit which is arranged on the shaft and is configured at least to interrupt transmission of a drive force if a torque limit is exceeded. The protective device further including at least one wrap-spring clutch unit configured to brake the shaft.

Protective device at least for protecting a user in the event of an uncontrolled blockage of a portable power tool

An electric switch, in particular for an electric power tool, in particular a hammer drill, comprises a first switching device and a second switching device, wherein the first switching device can be adjusted by adjusting a first mechanical signaling means from a first switched state to a second switched state, wherein the second switching device can be adjusted by adjusting a second electrical or mechanical signaling means from a third switched state in which the electric switch acts as a pushbutton into a fourth switched state in which the switch acts as a rocker switch. The disclosure further relates to an electrical power tool having an electric switch according to the disclosure.

Lockable electric switch

A hand-power tool includes at least one oscillation-damping device that has at least one damping spring and a damping mass. The hand-power tool also includes a drive mechanism and a mechanism housing. The mechanism housing has a housing cover which is provided for closing a chamber in which the drive mechanism lies, and the housing cover has at least one fixing mechanism that at least partially fixes the oscillation-damping device in at least one operating state.

Hand-power tool comprising an oscillation-damping device

The invention is based on a handheld power tool, having at least one vibration-cancelling device that has at least one cancellation spring and one cancellation mass. It is proposed that the cancellation mass is constructed of at least one first mass part and at least one second mass part.

Handheld power tool

Hammer drill

A hand-held power tool has a main element having a tool axis, a center of gravity, and a normal axis which extends perpendicular to the tool axis and through the center of gravity. The tool axis and the normal axis define a plane of motion. A handle supported in the plane of motion such that it is movable relative to the main element. A spring unit connects the handle with the main element and includes a spring element. The handle has a handle body, a rotary element which connects the handle body and the main element. The rotary element is rotatable relative to the main element and to the handle body.

Hand-held power tool

The invention relates to a hand-held electric power tool comprising at least one driven rotating part () that is mounted in at least one bearing (). According to the invention, the rotating part () is vibrationally decoupled from the bearing ().

Electric hand-held power tool

A hand-held power tool includes a main element with a normal axis which extends perpendicularly to a tool axis and through a center of gravity. A handle is supported in the plane of motion defined by the tool axis and the normal axis such that it is movable relative to the main element. A spring unit connects the handle with the main element, and has a spring element to define a trajectory of at least one portion of the handle in the plane of motion under the influence of a load force triggered when the handle is moved out of a neutral position and approaches the stationary main element. A rotary element defines a joint-free rotation axis, about which the handle rotates in the plane of motion when a motion takes place relative to the main element.

The hand-held power tool has a vibration-damped main handle. The hand-held power tool has a device for fastening the main handle to a main element configured so that when the main element moves out of a stationary position toward the main handle the main element swivels around at least one swivel axis so that it is guided along a trajectory that extends with a slant of at least 10&#xb0; relative to a flat surface, which extends through a longitudinal tool axis and which has a surface normal oriented in a normal direction perpendicular to the longitudinal tool axis. As a result vibrations with a movement component perpendicular to the longitudinal tool axis are damped as well as vibrations that induce motion of the main element in the direction of the longitudinal tool axis toward the main handle.

Hand-held power tool with improved vibration-damped handle

The invention is based on an electrical power tool with an electrical machine, having a motor housing that receives the electrical machine and having a rotatable brush plate for reversing a direction of rotation of the electrical machine. The brush plate is covered in its cross section by a pivotable cover.

Electric power tool with a rotatable brush plate

A very easy-to-actuate, replaceable tool fitting is comprised in that at least one movably supported profiled body () on an output spindle () or on the tool fitting () of the hand-held power tool and at least one profiled recess () on the output spindle () or on the tool fitting () are shaped and situated in such a way that when the tool fitting () is slid onto the output spindle (), the at least one profiled body () engages in detent fashion in the at least one profiled recess (), achieving both an axial locking and a rotary driving of the tool fitting () in relation to the output spindle () and means () are provided, which, through a rotating and sliding motion of the tool fitting () on the output spindle (), guide the profiled body () into the profiled recess ().

Hand-held power tool with a replaceable tool fitting

A handle for an electric hand tool, which in use, is detachably connected to the hand tool as an auxiliary handle (), includes at least one detection device (), which communicates with at least one regulating and/or control element in the electric hand tool through a contactless signal transmission device.

Handle with detecting unit

A hand power tool has a striking element via which a tool () in a tool holder () can be driven in striking fashion, which the tool holder can be detachably secured&#x2014;via its body ()&#x2014;to a drive part () via at least one locking element (), which the locking element, in its engaged position, is capable of being fixed in position radially by a retaining element (), which the retaining element is capable of being automatically guided by means of an operating element () out of its locked position into a release position that radially releases the locking element () in order to release the tool holder (), whereby the retaining element () is capable of being moved by a corresponding component () into its release position against a spring force of a spring element () when the tool holder () is pushed onto the drive part (), wherein the retaining element () is captively held on the drive part () and is capable of being guided into its release position by the operating element () in the push-on direction () of the tool holder () against a spring force of a spring element ().

Hand machine tool with a removeable tool holder

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Freiberg A. N., Germany

Axel Kuhnle